Feed-pump



2 Sheets-Shet 2.

(No Mqdel.)

I'. L. STONE.

FEED PUMP.

N0. 427,130. Patented May e, 1890.

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UNITED STATES PATENT FEED-PUMP.

SPECIFICATION forming' part of Letters Patent N0. 427,13Q, dated May 6, 1890.

Application filed October 18, 1889.

To all whom it may concern:

Be it known that I, FLORENTINE L. STONE, a citizen of the United States, and a resident of Brockton, in the county of Plymouth and State of Massachusetts, have invented new and useful Improvements in Feed-Pumps, of which the following, taken in connection with the accompanying drawings, is a specification.

This invention relates to improvements in feed-pumps; and it consists in mechanism for automatically adjusting and regulating the stroke of the pump while it is working, so as to maintain a constant, or nearly so, level of the water in the boiler, tank, or other receptacle into which the water is delivered from the pump, as will hereinafter be more fully shown and described, reference being had to the accompanying drawings, wherein- Figure 1 represents a front elevation of the improved pump, showing its automatic strokeregulating device connected to a float in the receptacle into which the liquid is being delivered from the pump. Fig. 2 represents a rear view of the improved pump. Fig. 3 represents an enlarged horizontal section on the line A B shown in Figs'. l and 2, and Fig. 4 represents a cross-section in the line C D shown in Fig. 3.

Similar letters refer to similar parts wherever they occur on the different' parts of the drawings.

a is the base of the pump, with inlet and outlet openings a. and a, pump-cylinder b, and frame c, secured to the base and pumpcylinder, as shown.

c" is the air-chamber, as usual.

CZ is the plunger or piston having head CZ and piston-rod c the latter being guided in the bracket or bearing piece c, that is secured to the frame c, as shown.

In a bearing in the upper end of the frame c is journaled the shaft c, to which is secured the gear or pulley e', which is set in a rotary motion by any well-known or suitable means.

e is a crank-pin secured to the gear or pulley e', and to such crank-pin is pivoted the upper end of the link f, the lower end of whichis pivoted to a pin or bolt g, attached to or forming a part of the inner end of the rock-lever G, as shown in Fig. 3.

The lever G is grooved longitudinally, and

Serial No. 327,474. (No model.)

within it is a movable block G', having a cylindrical side projection G, that passes through a corresponding perforation in the plunger or piston head CZ, as shown. in Fig. 3, by which arrangement the said plunger-head is pivoted to said block G.

The lever G has near its outer end a side trunnion or bolt g', to which is pivoted the upper end of a rocking frame or link H, the lower end of which is pivoted on the bolt h, that is secured in a suitable manner to the base a, as shown in Figs. 1 and Ll.

I is a screw shaft or bolt that is screwed through the block G', and has its outer end j ournaled in a bearing in the outer end of the rock-lever Gin such a manner as to be capable of a rotary motion in said bearing and prevented from moving longitudinally therein, as shown in Fig. 3. To the outer end of said screw-shaft I is secured the spur-gear t', the teeth of which mesh in the teeth of thespurgear pinion lo, that is secured to the shaft or'- spindle K, that is journaled in a bearing in the rock-lever G, and has secured to its inner end the bevel-gear Zo', the teeth of which mesh in the teeth of the bevel-gear Z, that is journaled on a pin or bolt L, secured to or made in one piece with the trunnion g on the rock-lever G, as shown in Figs. 3 and il. To the bevel-gear Z is secured the toothed or notched duplex ratchet-Wheel Z', which when turned in on'e direction-the one shown by the arrow 0n said wheel in Fig l-will cause the screw-shaft I to move the lever G in the direction shown by arrow on said lever in Fig. l, by which the stroke of the pump is increased by reason of the fulcrum g being moved away from the stud G on which the pump-rod is pivoted. By turning the ratchetwheel Z in an opposite direction the lever G will be caused to move in an opposite direction to that shown by arrow in Fig. 1, whereby the stroke of the pump will be automatically decreased on account of the fulcrum g being moved toward the stud G, and when said fulcrum g is moved to a place centrally in a line with said stud G no motion whatever will be imparted to the pump-rod from the rotary crank-disk e and its connection to the rockinglever G.

In connection with the adjustable rock-lever G,I use a regulating device for automatically increasing and decreasing the stroke of the pump during its working, so as to maintain a normal level of the water in the tank or boiler into which the liquid is delivered from the pump, and said device is constructed as follows:

In Fig. 1, M represents a tank or boiler into which the liquid is forced from the pump, and m represents the liquid therein. N represents a float-lever pivoted at n, and having attached to its inner end in any suitable or well-known manner the iioat N', as shown. To the outer end of the lever N is pivoted or connected the link or rod O, the lower end of which is hinged to the knee-lever P, that is pivoted at p to a bracket d3, secured to or forming a part of the base a, as shown in Figs. 1, 8, and 4.

P is a pin or projection on the lower end of the knee-lever P, that passes loosely through a slotted perforation q in the lower end of the lever Q, that is pivoted at q to the rocking arm or lever I-I, as shown in Figs. l and 4. In the upper recessed end of said lever Q is arranged a longitudinally-yielding spring-pressed bolt r, which is automatically forced upward with a proper pressure against the under side of the duplex pawl-block S, that is pivoted at s to the rocking arm or lever H, as shown in Figs. 1 and 4, and provided in its upper end with a pair of pawlprojections s and s, adapted to engage in and actuate the' notched ratchet-wheel l', as shown in Fig. 1.

T is a notched plate secured to the part a3 or the base a, and adaptedto serve as a stop to limit the rocking motion of the rock-lever Q; but this is not essential, as, if so desired, limit-pins or stop projections may be arranged in any suitable place to limit thermotion of said rock-lever Q without departing from the spirit of my invention.

The operation of the invention is as follows: During the operation of the pump, if the water in the tank or boiler f rom any cause should fall below the level of the normal one desired, then the lioat N will move the lever P, and with it the rock-lever Q, to the positions shown in Fig. 1, causing the springpressed bolt r to trip the pawl-block S on its4 fulcrum, so that its projection or tooth s will be held with a yielding pressure against the notched ratchet-Wheel Z, as shown in Fig. .1, and as long as the said pawl-block is held in such position it will cause the said ratchetwheel to turn intermittently around its axis in the direction of the arrow shown in Fig. 1 on said ratchet-wheel during the rocking movement of the lever G. The motion of the ratchet-wlieel being communicated to the screw-shaft I, as described, will canse the levei' G to be moved in the direction of the arrow shown on it in Fig. 1, and a corresponding increase in the pump-stroke, which will continue until the liquid in the tank or boiler 'rises above the desired normal level, when a reversal of the movements of the parts described takes place, causing the pawl-block S to be tripped, so that its tooth s will turn the ratchet-Wheel Z in an opposite direction to that shown. by t-he arrow in Fig. 1, and thereby cause a decrease in the length of the pump-stroke, and so on.

Having thus fully Ydescribed the nature, construction, and operation of my invention, I wish to secure by Letters Patent, and claim- In a pump, the adjustable rock-lever G, connected to the crank-rod, piston rod or plunger, and link H, as described, in combination with the screw-shaft I and ratchet-wheel Z geared to it, and the automatic device for actuating 'said ratchet-wheel and its connections, consisting of the duplex pawl-block S, t-he roeking lever Q, and the rocking lever P, connected to the latter and to a Hoat in the boiler or receptacle, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 10th day of June, A. D. 1889.

FLORENTINE L. STONE.

Vitnesses:

ALBAN ANDRN, MATTIE J. JACKSON. 

